Chemical Reactions and Equations — Science STD 10 — Question

Name the organs which produce sperms in human males.

In household circuits, is a fuse wire connected in series or in parallel?

What type of chemical reactions take place when:
Ammonia and hydrogen chloride are mixed?

When heat energy is absorbed by an object, ΔT represents the rise in temperature. What would ΔT represent if the object loses heat energy? (Practice Activity Sheet – 4)

Find the odd one out: Shark, Sting ray, Electric ray, Pomfret

In dispersion of sunlight by a glass prism, which colour is deviated the least?

Write the molecular formula of the oxide of any one of the elements in Mendeleev’s periodic table.

Tell me who am I? What is my class/ phylum?
1. I am sedentary marine animal drinking water all the time through numerous pores on the body.
2. I am venomous, eight legged creature having chitinous exoskeleton.
3. My body is covered by tunic. As a larva I swim but as an adult I settle down.

In the formation of spectrum of white light by a prism:

1. which colour is deviated least?
2. which colour is deviated most?

What type of ions are formed:

1. when an acid is dissolved in water?
2. when a base (or alkali) is dissolved in water?